我正在使用magento 1.9。它运行正常，我打开了http://127.0.0.1/nn/magento/index.php/admin（后端）页面，该页面显示了错误。
There has been an error processing your request
Exception printing is disabled by default for security reasons.
Error log record number: 446788966
前端工作正常，但后端工作不正常。
我在magento / var / report / 446788966.file中发现了此错误
错误：** {main}“; s：3：” url“; s：81：” / nn / magento / index.php / admin / dashboard / index / key / fe251ab7fd08b5f4f3622f777bd38db4 /“; s：11： “ script_name”; s：21：“ / nn / magento / index.php”; s：4：“皮肤”; s：5：“管理员”;}
更新：这些是我运行后端页面时的错误
错误：
Trace:
0 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Locale.php(527): Zend_Date_DateObject->setTimezone('PST8PDT')
1 C:\wamp\www\nn\magento\app\code\core\Mage\Reports\Model\Resource\Order\Collection.php(324): Mage_Core_Model_Locale->date()
2 C:\wamp\www\nn\magento\app\code\core\Mage\Reports\Model\Resource\Order\Collection.php(809): Mage_Reports_Model_Resource_Order_Collection->getDateRange('24h', 0, 0, true)
3 C:\wamp\www\nn\magento\app\code\core\Mage\Adminhtml\Block\Dashboard\Totals.php(53): Mage_Reports_Model_Resource_Order_Collection->addCreateAtPeriodFilter('24h')
4 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Block\Abstract.php(293): Mage_Adminhtml_Block_Dashboard_Totals->_prepareLayout()
5 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Layout.php(456): Mage_Core_Block_Abstract->setLayout(Object(Mage_Core_Model_Layout))
6 C:\wamp\www\nn\magento\app\code\core\Mage\Adminhtml\Block\Dashboard.php(50): Mage_Core_Model_Layout->createBlock('adminhtml/dashb...')
7 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Block\Abstract.php(293): Mage_Adminhtml_Block_Dashboard->_prepareLayout()
8 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Layout.php(456): Mage_Core_Block_Abstract->setLayout(Object(Mage_Core_Model_Layout))
9 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Layout.php(472): Mage_Core_Model_Layout->createBlock('adminhtml/dashb...', 'dashboard')
10 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Layout.php(239): Mage_Core_Model_Layout->addBlock('adminhtml/dashb...', 'dashboard')
11 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Layout.php(205): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
12 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\Layout.php(210): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
13 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Controller\Varien\Action.php(344): Mage_Core_Model_Layout->generateBlocks()
14 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Controller\Varien\Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
15 C:\wamp\www\nn\magento\app\code\core\Mage\Adminhtml\Controller\Action.php(275): Mage_Core_Controller_Varien_Action->loadLayout(NULL, true, true)
16 C:\wamp\www\nn\magento\app\code\core\Mage\Adminhtml\controllers\DashboardController.php(40): Mage_Adminhtml_Controller_Action->loadLayout()
17 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Controller\Varien\Action.php(418): Mage_Adminhtml_DashboardController->indexAction()
18 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Controller\Varien\Router\Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('index')
19 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Controller\Varien\Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
20 C:\wamp\www\nn\magento\app\code\core\Mage\Core\Model\App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
21 C:\wamp\www\nn\magento\app\Mage.php(684): Mage_Core_Model_App->run(Array)
22 C:\wamp\www\nn\magento\index.php(83): Mage::run('', 'store')
23 {main}